People who sleep late have more mental stamina and can outperform early risers.
33
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
The average cat sleeps about 2/3 of the day.
203
Blue light fends off drowsiness in the middle of the night, which could be useful to people who work at night.
240
The harder you concentrate on falling asleep, the less likely you are to fall asleep.
34
If you hold farts in during the day, they'll just come out when you sleep.
16
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212